$ npm install ssl-checker --save # npm i -s ssh-checker

var sslChecker = require("ssl-checker")
sslChecker('example.com', 'GET', 443).then(result => console.info(result));

{
"valid": true,
"days_remaining" : 90,
"valid_from" : "issue date",
"valid_to" : "expiry date"
}